Updated October 15, 2026
Quick Answer
If Planet Zoo 2 warns that your Sumatran orangutans have too many adult males, open the habitat's animal list and look for an individual marked Outsider (Gender Ratio). Review the warning and consider moving that animal to the Trade Centre if the game's recommendation supports it. Then check the remaining group's Social Group welfare.
Do not assume every orangutan habitat needs the same male-to-female ratio. If the warning is resolved but Space welfare remains below 100%, investigate the habitat's land, shelter and climbing-area readings separately.
Why the Male-Ratio Warning Appears
Planet Zoo 2 can flag a social group when it contains too many adult males. The affected animal's panel may display Outsider (Gender Ratio), while the social-group tooltip explains that the group exceeds the permitted number of males.
For example, a habitat containing four adult Sumatran orangutans—two males and two females—can display this warning. The key clue is the game's identification of an outsider, rather than simply the number of animals in the habitat.
The flagged animal may also have reduced Social Group welfare. Check the individual animal's panel and the group's current composition before making changes.
How to Fix the Sumatran Orangutan Male-Ratio Warning
1. Open the habitat's animal list
Select the habitat and review its animals. Identify the adult males and females, then look for an individual with a gender-ratio or outsider warning.
Start with the animal identified by the game rather than moving animals at random. This makes it easier to check whether your change addresses the actual problem.
2. Inspect the flagged outsider
Select the animal and open its welfare panel. Look for the Outsider (Gender Ratio) label and review the Social Group percentage.
A low Social Group reading can help identify a welfare problem, but it should not be treated as proof of a gender-ratio issue on its own. Use the specific warning and the group's current composition together.
3. Consider sending the outsider to the Trade Centre
If the game's recommendation supports removing the outsider, select the animal and use the option to send it to storage in the Trade Centre.
This removes the animal from the current habitat group without requiring you to sell or release it immediately. Once the transfer is complete, check the remaining animals and see whether the warning has changed.
If an animal transfer appears stuck, see Planet Zoo 2 Animals Stuck in Storage? How to Fix Transfer Problems.
4. Recheck the group before adopting more animals
After moving the flagged animal, inspect the remaining group again. If the warning persists, review the updated social-group information and follow the game's current recommendation.
Adding suitable females may help in some situations, but it is not automatically required for every male-ratio warning. Avoid adopting extra animals just to reach a fixed number without checking the needs of the group.
If you do acquire additional animals, make sure they have been transferred into the zoo and delivered to the intended habitat before assessing the new composition.
5. Check the updated Social Group reading
Select an animal in the adjusted group and review its welfare panel. A Social Group reading of 100% indicates that this category is fully satisfied for that animal.
Remember that Social Group, Space, Environment and Terrain are separate welfare categories. Resolving the social issue does not automatically correct a shelter deficit or another habitat problem.
How to Check Whether the Fix Worked
Use this checklist after changing the group:
- ☐ Outsider warning: Check whether the original warning has disappeared or another animal is now flagged.
- ☐ Social Group: Review the current percentage in an animal's welfare panel.
- ☐ Group composition: Confirm that the intended animals remain in the habitat.
- ☐ Other welfare categories: Check whether Space, Environment, Terrain or Enrichment still needs attention.
- ☐ Animal transfers: Confirm that any newly acquired animals have arrived in the correct habitat.
In the example, the initial panel for Cahyono showed Social Group at 35%, and he was marked as an outsider because of the gender ratio. A later panel for Farida showed Social Group at 100%. The final panel for Burhanuddin showed Social Group, Space, Environment and Terrain at 100%, with overall welfare at 98%.
These readings come from different animals' panels, so they should be treated as stages in the habitat's improvement rather than a controlled before-and-after comparison of one individual. Your results may differ depending on your group and habitat.
If your zoo has a broader ecosystem problem in addition to individual animal welfare issues, see Planet Zoo 2: How to Fix an Ecosystem That Isn't Established.
How to Fix a Separate Shelter-Space Problem
Fixing the male-ratio warning does not automatically resolve every welfare issue. If an orangutan's Space welfare remains below 100%, open the habitat's space breakdown and check the available land, navigable shelter area and climbing area.
In one habitat, the earlier readings were:
| Space category | Available | Required |
|---|---|---|
| Land area | 3,856 m² | 1,252 m² |
| Navigable shelter area | 97 m² | 139 m² |
| Climbing area | 3,506 m² | 360 m² |
The main deficit was navigable shelter area. Land and climbing space exceeded the displayed requirements, but the available shelter area did not.
Expand the shelter if the panel identifies a deficit
If your own Space panel shows insufficient shelter, extend the existing structure or add a suitable constructed shelter section. Place it where the animals can access it, then check the Space reading again.
In this example, Farida's earlier panel showed Space at 86%, with 97 m² of navigable shelter against a 139 m² requirement. After the shelter was expanded, Burhanuddin's later panel showed Space at 100%.
Because these readings came from different animals' panels, describe them as the earlier and later habitat readings—not as a direct measurement of one animal's welfare changing. The figures also illustrate this particular habitat, not a universal shelter requirement for every Sumatran orangutan group.
If you're troubleshooting another habitat welfare category, Planet Zoo 2 Animals Too Cold? How to Fix Habitat Temperature covers a separate temperature-related problem.
How to Check for Escape Points
After building or extending a shelter, inspect the habitat's Animal Traversable Area heatmap. It helps you check the ground accessible to the selected animal and identify possible escape points around habitat structures.
Pay attention to these indicators:
- Walkable escape points
- Climbable escape points
- Jumpable escape points
In this example, the final heatmap showed no active icons for these escape-point categories after the shelter expansion. This is a useful check, particularly when new structures are placed close to supports or other potentially climbable objects.
Do not assume that a shelter is automatically safe because it looks enclosed. Recheck the heatmap after construction and make sure you're viewing the result for the relevant animal.
Frequently Asked Questions
Do all Sumatran orangutan habitats need one adult male?
No universal ratio is established by this example. Check the game's warning and the current group composition rather than applying a fixed male-to-female ratio to every habitat.
Should I remove every adult male when the warning appears?
No. Start with the animal marked as an outsider and review the game's recommendation. Removing every male without checking the warning could create unnecessary problems.
Do I need to adopt more female orangutans?
Not in every case. Additional females were part of one group-adjustment example, but that does not prove they are necessary to resolve every gender-ratio warning. Recheck the group after each meaningful change.
Why is Social Group at 100% but overall welfare below 100%?
Overall welfare reflects multiple categories. An animal can have Social Group at 100% while Space, Environment, Enrichment or another category remains below its maximum. Check the full welfare panel to identify the remaining issue.
Why is Space still below 100% after fixing the male ratio?
The two problems are separate. Check the Space breakdown for a deficit in land, navigable shelter area or climbing area. If shelter is insufficient, expand it and review the updated reading.
How can I check whether my shelter creates an escape risk?
Open the Animal Traversable Area heatmap and inspect the walkable, climbable and jumpable escape-point indicators. Recheck after construction instead of assuming a new structure is safe based on appearance alone.
Final Takeaway
To fix the Sumatran orangutan male-ratio warning in Planet Zoo 2, identify the animal marked Outsider (Gender Ratio), review the game's recommendation and consider moving that animal to the Trade Centre. Then check the remaining group's Social Group reading and other welfare categories.
If Space remains below 100%, treat it as a separate habitat problem. Inspect the navigable shelter requirement, expand the shelter if needed, and use the Animal Traversable Area heatmap to check for escape points after construction.
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